ophyd.v2.core.wait_for_value

async ophyd.v2.core.wait_for_value(signal: SignalR[T], match: T | Callable[[T], bool], timeout: float)

Wait for a signal to have a matching value.

Parameters:

signal:

Call subscribe_value on this at the start, and clear_sub on it at the end

match:

If a callable, it should return True if the value matches. If not callable then value will be checked for equality with match.

timeout:

How long to wait for the value to match

Notes

Example usage:

wait_for_value(device.acquiring, 1, timeout=1)

Or:

wait_for_value(device.num_captured, lambda v: v > 45, timeout=1)